A researcher thinks that listening to classical music reduces anxiety. She measures the anxiety of 10...

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A researcher thinks that listening to classical music reducesanxiety. She measures the anxiety of 10 persons then plays Mozart's"Eine Kleine Nachtmusik". Following that the researcher measurestheir anxiety again. (Note that anxiety is measured on a scale from1 to 7, with higher numbers indicating increasedanxiety.)
Does the study support her hypothesis? Compute the upper boundof the confidence interval using the following data:
mean of the difference scores (subtract pretest from posttest):-1.6
standard error of the difference scores: 0.4
The formula for the CI upper bound is [standard error of thedifference scores]*[t critical value]+[mean of the differencescores]
How do you find the t critical value? and what is the value forthe upper bound?

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Here we need to determine whether listening to classical music reduces anxiety So the hypothesis can be built as follows Null Ho mean anxiety classical mean anxiety Alternative Hamean anxiety See Answer

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